Erlang exmpp从Packet获取正文

Question

我需要从输入xmpp包中使用Erlang / xmpp获取 body 属性。

我收到数据包：

 Record = #received_packet{packet_type=message,
                  raw_packet=Packet,
                  from=From,
                  type_attr=Type} when Type =/= "error

如何从Packet中提取正文消息？

谢谢。

Answer 1

如果您使用exmpp，可以使用模块exmpp_message：get_body / 1

http://www.process-one.net/docs/exmpp/devdoc/trunk/exmpp_message.html

Answer 2

不确定您是否已经通过了exmpp示例。以下是echo_client.erl示例的片段：

%% Send the same packet back for each message received
echo_packet(MySession, Packet) ->
    From = exmpp_xml:get_attribute(Packet, <<"from">>, <<"unknown">>),
    To = exmpp_xml:get_attribute(Packet, <<"to">>, <<"unknown">>),
    TmpPacket = exmpp_xml:set_attribute(Packet, <<"from">>, To),
    TmpPacket2 = exmpp_xml:set_attribute(TmpPacket, <<"to">>, From),
    NewPacket = exmpp_xml:remove_attribute(TmpPacket2, <<"id">>),
    exmpp_session:send_packet(MySession, NewPacket).